Griffin / Brooks #1 Poplar vs Black Locust - TreeTime.ca

Griffin / Brooks #1 Poplar vs Black Locust

Populus x Griffin

Robinia pseudoacacia

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(new stock expected: fall of 2025)

Griffin / Brooks #1 Poplar
Black Locust

Griffin Poplar is a tall, fast-growing, deciduous tree. One of the oldest prairie hardy varieties developed at the Brooks Research Centre, Griffin Poplar is a great shelterbelt tree. It is adaptable in many soil conditions. Too large for a normal city lot, Griffin Poplar is also ideal for large properties and parks.

Black Locust is an attractive tree. Its distinctive leaves are made of about a dozen bright green leaflets. It also notable for its fragrant white flowers, which smell of citrus.

Black Locust can grow in many situations, but prefers dry areas with lots of sun. It is robust and is an excellent choice for establishing shade in dry, open areas.

Important note: Much of the Black Locust is toxic to humans and livestock, including seeds, bark, and leaves.

Griffin / Brooks #1 Poplar Quick Facts

Black Locust Quick Facts

Zone: 2a
Zone: 3a
Height: 25 m (82 ft)
Height: 12 m (40 ft)
Spread: 6 m (20 ft)
Spread: 8 m (25 ft)
Light: partial shade, full sun
Light: full sun
Moisture: any
Moisture: dry, normal
Growth rate: very fast
Growth rate: fast
Life span: short
Life span: long
Suckering: high
Suckering: high


Bark: dark reddish brown to balck with furrows
Flowers: Creamy white flowers in a pyramidal shape bloom in may-june
Seeds: dark brown peapod-like pods
Hybrid: yes
Hybrid: no
Catkins: no
Catkins: no

In row spacing: 2.4 - 3 m (8 - 10 ft)

Between row spacing: 5 m (16 ft)
Other Names: false acacia, yellow locust